EGU Blogs

Principal Components Analysis

It’s a ruminant snout, deer

It’s a ruminant snout, deer

So the last couple of posts have been a bit of an eclectic mix of open access-y stuff and some of the research I’ve been doing on crocodiles as part of my PhD. This one is gonna be a bit of a change, about research that I recently published following my masters project a couple of years back. Weirdly, this was on the snouts of ruminants, and what they can tell us about their ecology.

The whole idea behind the project was to test previous research – to what degree can we use the different snout shapes exhibited by ruminant species to infer their ecology, based on feeding style. Traditionally, ruminants are classified into two groups – browsers and grazers – with the former being ascribed ‘pointed’ snout shapes, and the latter a more ‘blunt’ shape, for a more random cropping process when eating. We wanted to see what degree this was accurate.

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Grim reaper or gentle giants?

Therizinosaurs were some of the true freaks of the dinosaur world. I mean that in the nicest possible way for something that looked like the sick offspring of a giant chicken and Freddie Kruger. Perhaps the weirdest things about them were these long, scythe-like claws, that although may have seemed deadly, probably weren’t unless you were a particularly scrummy looking piece of foliage. That’s right, these cousins of tyrannosaurs and other theropods used their wicked sickle-claws for trimming hedges for food.

Flandersaurus?

Flandersaurus?

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Dinosaurs of a feather?

Feathered dinosaurs might not still be the new boys in town in the fossil world, but there’s still a tonne of cool research being done on them. One of the main fields is trying to figure out if different species were capable of powered flight, like in most modern birds. The recent finding of Aurornis xui appears to have confined the ability to fly just to a single feathered lineage, the one leading to modern birds, but how do we figure out whether they could fly or not?

Reconstruction of Aurornis xui Credit: Masato Hattori (source)

Reconstruction of Aurornis xui. Credit: Masato Hattori (source)

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